5 Heatstroke Essentials to Beat Japan's 2025 Heat Alerts

Stay a Step Ahead of the Heat

Japan's heatstroke warning emails keep piling up, and the best defense is to prepare before symptoms strike. Keep these five vetted items on hand so every family member--from toddlers to grandparents--has fast relief when the humidity spikes.

1. OS-1 Oral Rehydration Solution

Product: Otsuka Pharmaceutical OS-1 500ml × 6 bottles
Balanced electrolytes help the body absorb fluid even when appetite drops. OS-1 is hospital-approved, gentle on the stomach, and a smart staple to rotate through your fridge all summer.

2. KEYNICE USB Handheld Fan

Product: KEYNICE Handheld Fan (USB Rechargeable)
A 20-hour battery, desk stand, and quiet motor make this compact fan ideal for packed trains, festivals, or remote work. Clip it to your tote and recharge via USB-C overnight.

3. Mizuno Cooling Towel

Product: Mizuno Cooling Towel
Wet, wring, and snap--the microfiber fabric instantly cools and stays lightweight around your neck. Toss it in the wash after club activities or weekend hikes.

4. SUO Ice Neck Ring

Product: SUO Ice Neck Ring
This PCM ring naturally solidifies below 28°C. Wear it for 30 minutes to drop your perceived temperature without the shock of ice. Ideal for commutes, outdoor shifts, and school runs.

5. Portable Fine-Mist Spray Bottle

A slim mister keeps skin damp so sweat can evaporate and cool you faster. Fill it with chilled water before leaving home and pair with your handheld fan for instant relief while you queue or wait for the bus.

Heat Safety Checklist

Pair hydration, airflow, and targeted cooling for the best protection. Refresh your emergency bag today so you are ready when the next alert hits. We will keep sharing heat-smart ideas that help you thrive through the hottest weeks of the year.